What is the difference between undue influence and unconscionable bargain?

Unconscionable bargain requires the innocent party to be subject to a special disadvantage “which seriously affects the ability of the innocent party to make a judgement as to the [the innocent party’s] own self-interest”. The other party must also unconscientiously take advantage of that special disadvantage. There are two types of undue influence: Actual undue influence where it can be proven that one person exerted influence over another to have them enter into the contract, and presumed undue influence which is a deemed relationship of influence were one party is antecedent to the other party. The spheres of undue influence and unconscionable bargain overlap and the line between the two is often blurred.